1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user or with the express written consent of 8 * Sun Microsystems, Inc. 9 * 10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 13 * 14 * Sun RPC is provided with no support and without any obligation on the 15 * part of Sun Microsystems, Inc. to assist in its use, correction, 16 * modification or enhancement. 17 * 18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 20 * OR ANY PART THEREOF. 21 * 22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 23 * or profits or other special, indirect and consequential damages, even if 24 * Sun has been advised of the possibility of such damages. 25 * 26 * Sun Microsystems, Inc. 27 * 2550 Garcia Avenue 28 * Mountain View, California 94043 29 */ 30 #if !defined(lint) && defined(SCCSIDS) 31 static char sccsid[] = "@(#)netnamer.c 1.13 91/03/11 Copyr 1986 Sun Micro"; 32 #endif 33 /* 34 * netname utility routines convert from unix names to network names and 35 * vice-versa This module is operating system dependent! What we define here 36 * will work with any unix system that has adopted the sun NIS domain 37 * architecture. 38 */ 39 #include <sys/param.h> 40 #include <rpc/rpc.h> 41 #include <rpc/rpc_com.h> 42 #ifdef YP 43 #include <rpcsvc/yp_prot.h> 44 #include <rpcsvc/ypclnt.h> 45 #endif 46 #include <ctype.h> 47 #include <stdio.h> 48 #include <grp.h> 49 #include <pwd.h> 50 #include <string.h> 51 #include <stdlib.h> 52 #include <unistd.h> 53 54 static char *OPSYS = "unix"; 55 static char *NETID = "netid.byname"; 56 static char *NETIDFILE = "/etc/netid"; 57 58 static int getnetid __P(( char *, char * )); 59 static int _getgroups __P(( char *, gid_t * )); 60 61 #ifndef NGROUPS 62 #define NGROUPS 16 63 #endif 64 65 /* 66 * Convert network-name into unix credential 67 */ 68 int 69 netname2user(netname, uidp, gidp, gidlenp, gidlist) 70 char netname[MAXNETNAMELEN + 1]; 71 uid_t *uidp; 72 gid_t *gidp; 73 int *gidlenp; 74 gid_t *gidlist; 75 { 76 char *p; 77 int gidlen; 78 uid_t uid; 79 struct passwd *pwd; 80 char val[1024]; 81 char *val1, *val2; 82 char *domain; 83 int vallen; 84 int err; 85 86 if (getnetid(netname, val)) { 87 p = strtok(val, ":"); 88 if (p == NULL) 89 return (0); 90 *uidp = (uid_t) atol(val); 91 p = strtok(NULL, "\n,"); 92 *gidp = (gid_t) atol(p); 93 if (p == NULL) { 94 return (0); 95 } 96 gidlen = 0; 97 for (gidlen = 0; gidlen < NGROUPS; gidlen++) { 98 p = strtok(NULL, "\n,"); 99 if (p == NULL) 100 break; 101 gidlist[gidlen] = (gid_t) atol(p); 102 } 103 *gidlenp = gidlen; 104 105 return (1); 106 } 107 val1 = strchr(netname, '.'); 108 if (val1 == NULL) 109 return (0); 110 if (strncmp(netname, OPSYS, (val1-netname))) 111 return (0); 112 val1++; 113 val2 = strchr(val1, '@'); 114 if (val2 == NULL) 115 return (0); 116 vallen = val2 - val1; 117 if (vallen > (1024 - 1)) 118 vallen = 1024 - 1; 119 (void) strncpy(val, val1, 1024); 120 val[vallen] = 0; 121 122 err = _rpc_get_default_domain(&domain); /* change to rpc */ 123 if (err) 124 return (0); 125 126 if (strcmp(val2 + 1, domain)) 127 return (0); /* wrong domain */ 128 129 /* XXX: uid_t have different sizes on different OS's. sigh! */ 130 if (sizeof (uid_t) == sizeof (short)) { 131 if (sscanf(val, "%hd", (short *)&uid) != 1) 132 return (0); 133 } else { 134 if (sscanf(val, "%ld", &uid) != 1) 135 return (0); 136 } 137 /* use initgroups method */ 138 pwd = getpwuid(uid); 139 if (pwd == NULL) 140 return (0); 141 *uidp = pwd->pw_uid; 142 *gidp = pwd->pw_gid; 143 *gidlenp = _getgroups(pwd->pw_name, gidlist); 144 return (1); 145 } 146 147 /* 148 * initgroups 149 */ 150 151 static int 152 _getgroups(uname, groups) 153 char *uname; 154 gid_t groups[NGROUPS]; 155 { 156 gid_t ngroups = 0; 157 register struct group *grp; 158 register int i; 159 register int j; 160 int filter; 161 162 setgrent(); 163 while ((grp = getgrent())) { 164 for (i = 0; grp->gr_mem[i]; i++) 165 if (!strcmp(grp->gr_mem[i], uname)) { 166 if (ngroups == NGROUPS) { 167 #ifdef DEBUG 168 fprintf(stderr, 169 "initgroups: %s is in too many groups\n", uname); 170 #endif 171 goto toomany; 172 } 173 /* filter out duplicate group entries */ 174 filter = 0; 175 for (j = 0; j < ngroups; j++) 176 if (groups[j] == grp->gr_gid) { 177 filter++; 178 break; 179 } 180 if (!filter) 181 groups[ngroups++] = grp->gr_gid; 182 } 183 } 184 toomany: 185 endgrent(); 186 return (ngroups); 187 } 188 189 /* 190 * Convert network-name to hostname 191 */ 192 int 193 netname2host(netname, hostname, hostlen) 194 char netname[MAXNETNAMELEN + 1]; 195 char *hostname; 196 int hostlen; 197 { 198 int err; 199 char valbuf[1024]; 200 char *val; 201 char *val2; 202 int vallen; 203 char *domain; 204 205 if (getnetid(netname, valbuf)) { 206 val = valbuf; 207 if ((*val == '0') && (val[1] == ':')) { 208 (void) strncpy(hostname, val + 2, hostlen); 209 return (1); 210 } 211 } 212 val = strchr(netname, '.'); 213 if (val == NULL) 214 return (0); 215 if (strncmp(netname, OPSYS, (val - netname))) 216 return (0); 217 val++; 218 val2 = strchr(val, '@'); 219 if (val2 == NULL) 220 return (0); 221 vallen = val2 - val; 222 if (vallen > (hostlen - 1)) 223 vallen = hostlen - 1; 224 (void) strncpy(hostname, val, vallen); 225 hostname[vallen] = 0; 226 227 err = _rpc_get_default_domain(&domain); /* change to rpc */ 228 if (err) 229 return (0); 230 231 if (strcmp(val2 + 1, domain)) 232 return (0); /* wrong domain */ 233 else 234 return (1); 235 } 236 237 /* 238 * reads the file /etc/netid looking for a + to optionally go to the 239 * network information service. 240 */ 241 int 242 getnetid(key, ret) 243 char *key, *ret; 244 { 245 char buf[1024]; /* big enough */ 246 char *res; 247 char *mkey; 248 char *mval; 249 FILE *fd; 250 #ifdef YP 251 char *domain; 252 int err; 253 char *lookup; 254 int len; 255 #endif 256 257 fd = fopen(NETIDFILE, "r"); 258 if (fd == (FILE *) 0) { 259 #ifdef YP 260 res = "+"; 261 goto getnetidyp; 262 #else 263 return (0); 264 #endif 265 } 266 for (;;) { 267 if (fd == (FILE *) 0) 268 return (0); /* getnetidyp brings us here */ 269 res = fgets(buf, 1024, fd); 270 if (res == 0) { 271 fclose(fd); 272 return (0); 273 } 274 if (res[0] == '#') 275 continue; 276 else if (res[0] == '+') { 277 #ifdef YP 278 getnetidyp: 279 err = yp_get_default_domain(&domain); 280 if (err) { 281 continue; 282 } 283 lookup = NULL; 284 err = yp_match(domain, NETID, key, 285 strlen(key), &lookup, &len); 286 if (err) { 287 #ifdef DEBUG 288 fprintf(stderr, "match failed error %d\n", err); 289 #endif 290 continue; 291 } 292 lookup[len] = 0; 293 strcpy(ret, lookup); 294 free(lookup); 295 if (fd != NULL) 296 fclose(fd); 297 return (2); 298 #else /* YP */ 299 #ifdef DEBUG 300 fprintf(stderr, 301 "Bad record in %s '+' -- NIS not supported in this library copy\n", 302 NETIDFILE); 303 #endif 304 continue; 305 #endif /* YP */ 306 } else { 307 mkey = strtok(buf, "\t "); 308 if (mkey == NULL) { 309 fprintf(stderr, 310 "Bad record in %s -- %s", NETIDFILE, buf); 311 continue; 312 } 313 mval = strtok(NULL, " \t#\n"); 314 if (mval == NULL) { 315 fprintf(stderr, 316 "Bad record in %s val problem - %s", NETIDFILE, buf); 317 continue; 318 } 319 if (strcmp(mkey, key) == 0) { 320 strcpy(ret, mval); 321 fclose(fd); 322 return (1); 323 324 } 325 } 326 } 327 } 328